GPS module keeps rebooting

I’m using a gps module L86-M33, it keeps sending me “$PMTK011,MTKGPS*08”.
Any idea about why I’m I receiving the message ?
Is there any solution ?

Thank you

Here are my suggestions:

  1. Try to provide the module single power supply, then see whether the situation disappears or not. If so, the problems would be ①power supply circuit ② an abnormal RESET pin (or reset circuit).

  2. Upgrade the latest firmware. (1.2 MB)

Best regards.